%0 Journal Article
%T 金属套管对多分量井间电磁响应的影响
%A 魏宝君
%A 李晓强
%A 任广强
%A 贾毅龙
%A 吴康康
%A 党峰
%A 刘福平
%J 中国石油大学学报(自然科学版)
%D 2018
%R 10.3969/j.issn.1673-5005.2018.05.007
%X 采用柱状成层各向异性介质中并矢Green函数的解析式模拟当发射井含金属套管时多分量井间电磁场的响应,并系统分析金属套管对井间电磁信号不同分量的影响规律。计算结果表明,金属套管的存在导致井间电磁信号所有分量的幅度衰减和相位延迟。在固定套管参数和发射频率的前提下,不同分量的幅度衰减与相位延迟分别具有相同的数值且保持恒定,与线圈系位置和地层电导率无关。频率越高,套管厚度越大,套管磁导率和电导率越大,金属套管导致的幅度衰减和相位延迟越明显。针对发射井、接收井单井或均含有金属套管的情况,在对井间电磁测量数据进行反演时采用该解析方法即可事先消除金属套管的影响。</br>The multi-component cross-hole electromagnetic field 's responses were simulated using an analytical expression of dyadic Green 's functions in cylindrically stratified anisotropic media.With the transmitter borehole encased with a metal casing, the effects of metal casing on different components of cross-hole electromagnetic signals were analyzed systematically.The results show that the existence of metal casing will lead to amplitude attenuation and phase delay for all components of cross-hole electromagnetic signals. Under the condition of fixed casing parameters and frequency,the amplitude attenuation and the phase delay variations remain constant for different components, the coil position and the formation 's conductivity. The amplitude attenuation and phase delay caused by the metal casing become more obvious for higher frequency, larger casing thickness and larger casing permeability and conductivity. In the case that the transmitter borehole and/or the receiver borehole are encased with metal casing, the effects of metal casing can be corrected by this analytical method before inverting the cross-hole electromagnetic measurements
%K 井间电磁响应 金属套管 多分量 并矢Green函数&lt
%K /br&gt
%K cross-hole electromagnetic responses metal casing multi-component dyadic Green 's functions
%U http://zkjournal.upc.edu.cn/zgsydxxb/ch/reader/view_abstract.aspx?file_no=20180507&flag=1